WO1993019252A1

WO1993019252A1 - Operating machine with an articulated arm, laterally displaceable, endowed at the end of the respective operating means

Info

Publication number: WO1993019252A1
Application number: PCT/IT1992/000032
Authority: WO
Inventors: Franco Liverani
Original assignee: Comet-Itr S.P.A.
Priority date: 1992-03-20
Filing date: 1992-03-20
Publication date: 1993-09-30
Also published as: AU1448792A

Abstract

The object of the invention is to provide an operating machine with an articulated arm, laterally displaceable, composed substantially by a cabin arm (4) and forearm (5) and which at the end of said forearm (5) includes an operating unit (6), characterized in that: the articulation zone between said cabin arm (4) and said forearm (5) of said articulated arm is endowed with articulation (7) also on a vertical axis by parallelogram system (S1 4 12' S2/A B G F; S1 4 12 13 14 S2/A B C D+C E F G); dynamic fluid cylinder means have been provided in said articulation (8) in a way to control the respective angle which is to be made on said vertical axis in order to, rotating the cabin frame (3) and placing said cabin arm in the corresponding angled position (4), counterrotate said forarm (5) to put it in a position at least parallel (Y) to the longitudinal symmetry chassis axis of the machine in the advancement direction (X).

Description

DESCRIPTION

Operating machine with an articulated arm , laterally displaceable. endowed al ihe end of the respective operating means.

Technical Field The invention relates to an operating machine with an articulated arm, displaceable laterally and which has an operating means at the respective end, as power shovels, perforators, mowers etc. We intend as an operating machine, any excavator with an articulated arm, either tracked or on tires, or mechanical shovels with a back excavator means or others, not excluding the operating machines which are equipped at the end of the arms with perforating points as lawn mowers for parks and gardens etc.

Background Art In prior art is known for example that the lateral displacement of the arm of power shovels can be made endowing the horizontal articulated joint attachment of the arm on the rotary structure (on joint bearing) of the cabin frame, with another articulated joint on the vertical axis. In such a way, rotating the cabin frame on one side and counterrotating the arm in order to make it parallel to the longitudinal axis, we obtain a displacement outside of the longitudinal axis of the excavator arm. This solution represents however, the drawback that it is substantially limited by the distance of the position of pivoting of the arm that in turn is limited substantially by the encumber of the rotatable cabin.

In other solutions an articulated joint is present between the arm and the forearm, but such an articulation is vertical only in a certain position of the arm and thus it is difficult and complicated to realize the excavation vertically.

Other solutions have been also realized with a double articulation that presents a certain complexity for their realization and a limited excavation distance from the longitudinal symmetry axis.

Disclosure of Invention The object of the invention is to allow a greater lateral displacement of the excavation in respect to the longitudinal symmetry axis of the excavator and to consent that the excavation is made with a good perpendicularity in any condition.

This and other scopes are reached with the invention as stated by the claims, by means of an operating machine with a laterally displaceable articulated arm, composed substantially by a cabin arm and forearm, at the end of forearm being placed an operating unit, characterized in that the articulation zone between said cabin arm and said forearm of the articulated arm is equipped with an articulation also on the vertical axis by a simple or double parallelogram system and provided with a dynamic fluid cylinder means in a way to control the respective angles that can be made. rotating the cabin frame and putting said cabin arm in correspondent angled position and counterrotating said forearm to put it in a position which is al least parallel to the longitudinal symmetry axis of the chassis of the machine in the advancement direction . This solution makes possible an increase of the lateral excavation distance of the excavator in respect to its intermediate position.

The invention is better understood with the enclosed description supplied only for example, in which: Figure 1 represents a schematic view of the excavator seen from above with the articulated arm angled to carry out an excavation in a lateral position to the machine. Figure 2 represents a side view in elevation of the machine of Figure 1 with a first oleodynamic cylinder solution for the vertical command of the forearm. Figure 2A represents an alternative solution in a view similar to Figure 2. Figure 3 represents a side view in elevation of the machine of Figure 1 with a second oleodynamic cylinder solution for the vertical command of the forearm. Figure 4 represents a side view in elevation of the machine of Figure 1 with a third oleodynamic cylinder solution for the vertical command of the forearm. Making reference to the Figures 1 ,2,3,4. it is disclosed that 1 indicates the machine chassis of frame (in the specific case with wheels, but it could can be also tracked ). 3 represents the rotatable cabin frame mounted on said frame by the intermediation of joint bearing according to prior art, 4 represents the cabin arm pivoted only on a horizontal axis. 5 represents the forearm pivoted and moved both on horizontal axis by means of the bracket F and on the vertical axis 7. According to invention, being: - the pivoting on a horizontal axis of said cabin arm 4 is controlled by the leverism 12.13, 14 with the respective parallelogram pivoting systems G F, E D C, A B in connection with the respective base brackets ( S I S2 ): - the pivoting on the horizontal axis of said forearm 5 is controlled by the oleodynamic cylinder (9) in the three solutions of the Figures 2,3,4, being however preferable the solution of Figure 2 because the cylinder command is enclosed in the forearm, while the other solutions can involve encumber obstacles; - the pivoting on vertical axis 7 is controlled by the oleodynamic cylinder 8. The movement of the shovel 6 is operated according to well known techniques by the oleodynamic cylinder 10. The movement on a vertical axis of said forearm (5) is carried out by means of the dynamic fluid cylinder (8 ) secured by the cylinder placed laterally to the respective cabin arm (4). According to Figure 2A we can sec an arm articulated by a simple parallelogram S I 4 S2 12', generally of the type mountable on the rear of the power shovels with tires or tracked. In the same solution is illustrated the particular contrivance of the insertion of the oleodynamic cylinders 1 1 and 9 inside the respective cabin arm (4) and forearm (5.).

It is disclosed furthermore that the oleodvnamic cylinder 9 is associated to the parallelogram PI P2 P3 P4 by a pair of delay levers 91 ,92 on the bracket S3 of forearm support 5, similarly to the parallelogram FI F2 F3 F4, made with the pair of intermediate levers 101 and 102 for the orientation of the shovel 6 by the cylinder 10. Advantageously according to Figure 2A the operating machine is identified for the fact that the said dynamic fluid cylinder (9) that commands the forearm (5) in respect to the cabin arm (4) is enclosed in an embedding (Pi) that extends over the forearm (5) and beneath a respective dynamic fluid cylinder (10) of orientation of the operating unit (6) and both have an assembly on the respective opposite parallelogram (PI P2 P3 P4 ; FI F2 F3 F4).

Claims

Claims 1. Operating Machine with an articulated arm. laterally displaceable. composed substantially by a cabin arm (4) and forearm (5) and which at the end of said forearm (5) includes an operating unit (6), characterized in that: - the articulation zone between said cabin arm (4) and said forearm (5) of said articulated arm is endowed with articulation (7) also on a vertical axis by parallelogram system (S I 4 12' S2/A B G F ; SI 4 12 13 14 S2/A B C D+C E F G); - dynamic fluid cylinder means have been provided in said articulation (8) in a way to control the respective angle which is to be made on said vertical axis in order to, rotating the cabin frame (3) and placing said cabin arm in the corresponding angled position (4), counterrotate said forearm (5) lo put it in a position at least parallel (Y) to the longitudinal symmetry chassis axis of the machine in the advancement direction (X).

2. Operating Machine according to claim L, characterized in that the movement on the horizontal axis of said forearm (5) is carried out by means of dynamic fluid cylinder (9) having the respective body cylinder enclosed in the same forearm (5).

3. Operator Machine according to claim 1., characterized in that said parallelogram system is of a simple type (S I 4 12' S2).

4. Operator Machine according to claim I , characterized in that said parallelogram system is of a double type (SI 4 12 13 14 S2).

5. Operating Machine according to claims 1 and 2, characterized in that said interior cylinder (9) of said forearm (5) is operatively mounted on one side at the end of said forearm (5) and on the other on the parallelogram articulation (PI P2 P3 P4) by two intermediate levers (91 92) one pivoted on the respeclivc adjustable support brackets (S3) and on said forearm (5).

6. Operating Machine according to claims 1 and 2, characterized in that said dynamic fluid cylinder (9) that commands said forearm (5) in respect lo said cabin arm (4) is enclosed in one embedding (Pt) thai extends over said forearm (5) and beneath a respective dynamic fluid cylinder (10) to orientate the operating unit (6) and both are assembled on the respective opposite parallelogram (PI P2 P3 P4 ; FI F2 F3 F4).